Abstract: A method, system, and computer program product perform distributed timing analysis of an integrated circuit design. Aspects include dividing the integrated circuit design into non-overlapping design partitions, each design partition including nodes and edges, each edge interconnecting a pair of the nodes. Aspects also include identifying speculative nodes among the nodes, each speculative node having at least one and less than all timing inputs available and being associated with a speculative processing task, and identifying non-speculative nodes among the nodes, each non-speculative node having all timing inputs available and being associated with a non-speculative processing task. Assigning each of the non-speculative processing tasks to a respective processor of a processing system specific to each design partition for timing analysis processing is done prior to assigning any of the speculative processing tasks.

Abstract: A method, system, and computer program product for performing incremental common path pessimism analysis in integrated circuit design includes performing common path pessimism removal (CPPR) analysis to provide timing credit for one or more paths that are subject to common path pessimism. The method also includes identifying one or more post-CPPR critical paths based on the CPPR analysis, setting flags for critical nodes of the one or more post-CPPR critical paths, performing a design fix to address the one or more post-CPPR critical paths, and applying a set of rules based on the design fix and the flags to identify seed points among the critical nodes of the one or more post-CPPR critical paths. Invalidating and re-performing the CPPR analysis is done only for paths associated with the seed points.

Abstract: A wireless power receiver includes a power receiving circuit wirelessly receiving power transmitted from a wireless power transmitter so as to generate an induced current, and a rectifying-and-modulating circuit including first to eighth switches and a control unit. The control unit is operable to control operation of each of the first to eighth switches between conduction and non-conduction. Accordingly, the first to fourth switches cooperatively constitute a full-bridge rectifier for rectifying the induced current generated by the power receiving circuit, and each of the fifth to eighth switches is operable to switch synchronously with a respective one of the first to fourth switches or to became non-conducting, thereby changing an amplitude of the induced current.

Abstract: A control circuit of a power converter includes: a zero current detection circuit for detecting a current flowing between an inductor and a voltage output terminal of the power converter to generate a zero current detection signal; an adjusting circuit for generating an adjustment signal according to the zero current detection signal; a clock signal generating circuit for adjusting a frequency of a clock signal according to the adjustment signal; a periodical signal generating circuit for generating a periodical signal according to the clock signal; an error detection circuit for generating an error signal; and a control signal generating circuit for generating a control signal to control operations of a power switch. If the and amount of pulses generated by the zero current detection circuit satisfy a predetermined condition, the adjusting circuit switches the power converter's operation mode from DCM to CCM.

Abstract: A LED driver using a PWM signal for dimming control includes a power converter and a current regulator. The power converter provides an output voltage and a load current for a plurality of LEDs. The current regulator provides a load current dependent signal for the power converter to speed up load transient response caused by variation of the load current, to reduce the ripple of the output voltage, and thereby to avoid audio noise during PWM dimming.

Abstract: A power management unit, adapted to a wireless power supplying unit, for switching between input powers and providing a rated voltage or a variable flow current is provided. The power management unit includes a rectifying unit, a regulating unit, and a control unit. The rectifying unit converts AC power into DC power. The regulating unit is connected to the rectifying unit and generates a stable rated voltage or a variable flow current. The control unit is connected to the regulating unit and controls the input power driving the regulating unit. In addition, an apparatus and a method for a wireless power supplying unit are provided.

Abstract: Serially connected low voltage transistors are used to replace a high voltage transistor in a voltage conversion circuit for a driver, or parallel connected sub-transistors are used to establish a high voltage transistor having an effective size dynamically adjusted according to loading of the driver, to reduce switching loss and thereby improve the efficiency of the driver.

Abstract: A wireless power receiver includes a power receiving circuit wirelessly receiving power transmitted from a wireless power transmitter so as to generate an induced current, and a rectifying-and-modulating circuit including first to eighth switches and a control unit. The control unit is operable to control operation of each of the first to eighth switches between conduction and non-conduction. Accordingly, the first to fourth switches cooperatively constitute a full-bridge rectifier for rectifying the induced current generated by the power receiving circuit, and each of the fifth to eighth switches is operable to switch synchronously with a respective one of the first to fourth switches or to became non-conducting, thereby changing an amplitude of the induced current.

Abstract: A control circuit of a power converter includes: a zero current detection circuit for detecting a current flowing between an inductor and a voltage output terminal of the power converter to generate a zero current detection signal; an adjusting circuit for generating an adjustment signal according to the zero current detection signal; a clock signal generating circuit for adjusting a frequency of a clock signal according to the adjustment signal; a periodical signal generating circuit for generating a periodical signal according to the clock signal; an error detection circuit for generating an error signal; and a control signal generating circuit for generating a control signal to control operations of a power switch. If the and amount of pulses generated by the zero current detection circuit satisfy a predetermined condition, the adjusting circuit switches the power converter's operation mode from DCM to CCM.

Abstract: A power supply uses a power converter to generate a regulated voltage by referencing to a first DC voltage, a low dropout (LDO) regulator to generate an output voltage from the regulated voltage by referencing to a second DC voltage, and a reference voltage generator to dynamically adjust the first DC voltage according to the input voltage and the control voltage of the output transistor of the LDO regulator. The dropout voltage of the LDO regulator can be minimized to maintain the high efficiency of the power supply at different loading or selected output voltages.

Abstract: The present invention discloses a single-wire transmission interface, and a method of transmission through single-wire. The method comprises: providing a single-wire signal through a single-wire; and transmitting information only in a transmission period defined by a fixed first time period starting from one of a rising or a falling edge of the single-wire signal.

Abstract: The present invention provides a medical dressing for respiratory epithelial cells comprising a biocompatible polymer and retinoic acid, wherein, based on total volume of the dressing, the polymer is 99% or more, and retinoic acid is 1% or less.

Abstract: A LED driver integrated circuit has a voltage input pin, a voltage output pin, a capacitor pin, and a switching circuit connected to the capacitor pin and the voltage output pin. The capacitor pin and the voltage output pin are for a flying capacitor to be connected therebetween, and thus the switching circuit and the flying capacitor establish a charge pump to convert an input voltage received by the voltage input pin into an output voltage at the voltage output pin.

Abstract: A heat-collecting kiln device includes a housing assembly including a single housing or a plurality of housings having a same height or different heights, with the housings stackable one upon another. A top lid is mounted on a top of the housing assembly to seal the housing assembly and includes an observation hole. A base is mounted to a bottom of the housing assembly to seal the housing assembly. A cover is mounted to the top lid to seal the observation hole. The cover is removable to reveal the observation hole. The heat-collecting kiln device further includes a net and at least one leg. Each housing is comprised of four modular elements each having a mortise engaged with a tenon of another modular element. One of the modular elements includes a temperature detection hole.

Abstract: A LED driver using a PWM signal for dimming control includes a power converter and a current regulator. The power converter provides an output voltage and a load current for a plurality of LEDs. The current regulator provides a load current dependent signal for the power converter to speed up load transient response caused by variation of the load current, to reduce the ripple of the output voltage, and thereby to avoid audio noise during PWM dimming.

Abstract: Serially connected low voltage transistors are used to replace a high voltage transistor in a voltage conversion circuit for a driver, or parallel connected sub-transistors are used to establish a high voltage transistor having an effective size dynamically adjusted according to loading of the driver, to reduce switching loss and thereby improve the efficiency of the driver.

Abstract: A heat-collecting kiln device includes a housing assembly including a single housing or a plurality of housings having a same height or different heights, with the housings stackable one upon another. A top lid is mounted on a top of the housing assembly to seal the housing assembly and includes an observation hole. A base is mounted to a bottom of the housing assembly to seal the housing assembly. A cover is mounted to the top lid to seal the observation hole. The cover is removable to reveal the observation hole. The heat-colleting kiln device further includes a net and at least one leg. Each housing is comprised of four modular elements each having a mortise engaged with a tenon of another modular element. One of the modular elements includes a temperature detection hole.

Abstract: A power supply uses a power converter to generate a regulated voltage by referencing to a first DC voltage, a low dropout (LDO) regulator to generate an output voltage from the regulated voltage by referencing to a second DC voltage, and a reference voltage generator to dynamically adjust the first DC voltage according to the input voltage and the control voltage of the output transistor of the LDO regulator. The dropout voltage of the LDO regulator can be minimized to maintain the high efficiency of the power supply at different loading or selected output voltages.

Abstract: The present invention provides a transistor switch on a light emitting device channel, the transistor switch receiving a control voltage VG. A current source circuit controls the current on the light emitting device channel, the current source circuit requiring a minimum voltage VR for normal operation. The present invention further provides a dynamic headroom controller circuit which compares a voltage VS at a current outflow end of the transistor switch with the voltage VR to determine the relationship between the voltage VS and the voltage VR when the control voltage VG is higher than a reference voltage VH, and adjusts the voltage difference between the voltage VS and the voltage VR accordingly.

Abstract: The present invention discloses an adaptive two-stage voltage regulator and a method for controlling the same. The adaptive two-stage voltage regulator includes: a voltage regulator for converting an input voltage (Vin) to a middle voltage (Vm), wherein Vin?Vin_max; a linear regulator for converting the middle voltage to an output voltage (Vout); and a middle voltage controller for adjusting the middle voltage according to (1) an input voltage indicator and one of (2a) an output voltage indicator and (2b) a predetermined reference signal, such that when Vin?Vout, Vm=Vout+?V and (Vout+?V)<Vin_max.